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  #31  
Old 10-17-2007, 06:01 AM
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Originally Posted by mercmad6.3 View Post
Interesting..I have had a lot of Experience with babbet pounding Ford Model T's,and Chev splash feed sixes so i'm fully aware of how a bearing works ( i'm a Diesel engineer by trade ) ,but I stand by my comments. Imagine if you will that the pistons on most mercedes Engines up to the last of M117 light alloy V8's are oil cooled Plus ,they ALL have the drilled conrods and there are very few production engines which have ever featured this.
You need to examine a wider selection of modern era engines. I have looked at hundreds and designed systems for them. Piston directed oil squirters are quite common at present and by a variety of means. Mercedes simply chose a more expensive means of carrying the oil to where its needed. Superior? Yes, I think so. Talk to some engineers employed by OEMs. You'll find that there are all sorts of great systems designed for windage control etc. that never make it past accounting.


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Originally Posted by mercmad6.3 View Post
One that comes to mind is the XK jag engine.Any one who has ever owned a 3.8 Mk2 will attest to the huge appetite for oil.A direct result of huge amounts of oil splashing around the underside of the pistons and being splashed onto the bore walls. This was necessary for engine longevity ,resulting from a mix of ordinary oil quality and the need for speed from enthusiastic owners.
Ok, however I am not sure how you feel this furthers your position? It is actually a counter-example. I've got a Jag straight six engine sitting outside waiting for a pattern. Did the V12 a few years back. Owned a XJ6 Series I and XJ12 Series I myself.


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Originally Posted by mercmad6.3 View Post
Now..with the Mercedes engine,I again ask you "where is the oil from under the pistons is expected to run to?" .If there is something in the way of a free flow of oil ,it's going to build up on top of the scaper and flood the crank shaft. ...
Aha. I see what you are saying. Yes, that is exactly why I add drainage vents in or to the sides wherever possible. By the way, the basic design I made for the Mercedes 2.3 Cosworth is also used by Dodge in the Third Gen Viper V10 (2003-2006). It is also cited in a recent patent by GM. Also, Cosworth Engineering recently came up with an offset to my scraper for the Mitsubishi Evo engines. So, I am not sure if you trust the engineering of a firm that Mercedes trusted to tune its own engines (??).


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Originally Posted by mercmad6.3 View Post
... Thats Why mercedes engines have such a deep sump pan,which is some distance from the crankshaft centerline. ( EXCEPT THE M-100 6.9 WHICH HAS A SEPERATE OIL TANK,ALA DRY SUMP )
Well, yes, having a deep sump is common knowledge as a way to reduce parasitic oil losses. Porsche also solved its V8 issues with its modern designs via a dry sump solution.


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Originally Posted by mercmad6.3 View Post
... And once again I repeat the statement ." Daimler Benz had vast experience with engines",gained from Racing in the 1930 's and from Aircraft development in the 1930's through to 1945...With that in Mind,don't you think they would have utilised the crank scraper idea?
Look, I am sorry -- you apparently do not realize that Mercedes does in fact use scrapers. Floor mounted scrapers. Just like Porsche. Just like in the Ford FE.


Post comment: It is very clear that a vast amount of existing scraper technology is unrecognized in modern engine designs. I guess you have to do the background study to be able to abstract from what you see.


Last edited by Kevin Johnson; 10-17-2007 at 06:15 AM.
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  #32  
Old 10-17-2007, 07:09 AM
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Originally Posted by mercmad6.3 View Post
-snip-...
And once again I repeat the statement ." Daimler Benz had vast experience with engines",gained from Racing in the 1930 's and from Aircraft development in the 1930's through to 1945...With that in Mind,don't you think they would have utilised the crank scraper idea?
Where in the crankcase would you propose effectively locating a scraper in an inverted V12 with a dry sump scavenge port in either valve cover? Remember that the absence of a device does not necessarily mean that it was not considered.





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  #33  
Old 10-17-2007, 07:40 AM
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what is that lovely beast? -CTH
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  #34  
Old 10-17-2007, 07:44 AM
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what is that lovely beast? -CTH
Sorry, should have mentioned they are pics of various examples of the D-B 60x series. Powered the BF109G, for example. Very famous series.

Edit: Do you need the bell housing pattern?

Might cause a bit of understeer... But of course the provision for timing the automatic cannons will make up for that in the daily commute...

Here's some light reading...

http://en.wikipedia.org/wiki/Green_Monster_(dragster)

Last edited by Kevin Johnson; 10-17-2007 at 07:53 AM.
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  #35  
Old 10-17-2007, 02:17 PM
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that link would be http://en.wikipedia.org/wiki/Green_Monster_%28car%29
-CTH
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  #36  
Old 10-18-2007, 05:00 AM
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Originally Posted by mercmad6.3 View Post
... babbet pounding Ford Model T's, ...

Nice memory popped into my head. I had an old friend in his 80s, Clester -- went by "Doyle", who passed away about 13 years ago. He was part Native American and grew up in Oklahoma (later moved during the Dust Bowl of the 1930s to California -- a so-called Okie). Great mechanic with a yard full of old cars -- and dozens of cats and warrens full of rabbits running underneath the cars.

He was telling me how during the Depression they would use bacon rind as a replacement for the babbit in Model T engines. Worked fairly well he said.

Really miss him.
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  #37  
Old 01-14-2008, 01:42 PM
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Mercedes diesel engines, in fact, use crank scrapers

Ok, end of argument -- Mercedes does, in fact, use crank scrapers even in its diesel engines. Just like in its gasoline engines. Just like Porsche does. Just like BMW does. Just like virtually every OEM on the planet Earth. Etc., etc. etc. Yikes. And this is on an engine from 22 (twentytwo) years ago folks -- this should not have been a big mystery or controversy. At all.

Snake oil?!?! Learn to recognize extant technology!!!!

603:
It even has cutouts for the rods...


603 above the gas version:
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  #38  
Old 01-16-2008, 07:57 AM
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And there are a series of ridges inside the 380sl oil pan I am cleaning. They're straight fore and aft, and do a nice job keeping the alloy stiff at the same time they collect oil bits. -CTH

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